Yeah, you'll get a direct 'movement' of the wheel out wards by whatever thickness of spacer you put on. I'd say go hubcentric though, that way the wheel sits on its spigot part, the bolts tightening it in to the whole assembly, those spacers that don't have the spigot locator (as hubcentric do) rely on the wheel nuts to then take the weight of the wheel (depending on how much you've spaced them out by). I've been told by most wheel centres that anything over 5mm needs longer bolts, ideally a full 5 turns of the wheel nuts into the hub if you retain your existing wheel nuts. Hope that helps some.
